Module context 

Query rewriting framework

This module provides a general-purpose framework for transforming function calls into equivalent predicate expressions at compile time. The framework enables:

• Full predicate pushdown to storage
• Index utilization
• Extensible plugin architecture for adding new rewrite rules

Architecture

The framework consists of:

• RewriteRule trait: Interface for implementing rewrite transformations
• RewriteRegistry: Global registry of all rewrite rules
• ExpressionWalker: Traverses expression trees and applies rules
• RewriteContext: Contextual information during rewriting

Example Usage

use uni_query::rewrite::rewrite_query;

// Rewrite a complete query
let rewritten = rewrite_query(query)?;

Adding New Rules

See rules/README.md for a guide on implementing custom rewrite rules.

Structs

RewriteConfig

Configuration options for query rewriting

RewriteContext

Contextual information available during query rewriting

RewriteStats

Statistics collected during rewriting

RuleStats

Per-rule statistics